Problem with the call and response max/arduino example …

Yes, it works, the sensor data comes out into the three number boxes, but there is a problem:
– everytime I hook up the arduino, the sensor signals appear in different number boxes. This means that I need to find out which sensor comes out into which number box, everytime I boot max.

My question is: How do I make sure that the sensor signal from A1 is routed into the first number box, the sensor signal A2 is routed into the second number box etc, everytime I open max?